Key parameters at a glance

A radius of 2.70 Earth radii
A mass of 7.77 Earth masses
Surface gravity around 1.06 g
An orbital period of 19.586 days
Semi-major axis 0.1392 AU
Equilibrium temperature 666 K (393 °C)
Distance from Earth 2,432.28 light-years
Earth Similarity Index 0.369
Travel time at Voyager 1 speed 42,893,181 years

Kepler-1785 b Planet Profile

Physical Specs

Radius

2.70 R⊕

Radius (Jupiter)

0.241 R♃

Mass

7.77 M⊕

Mass (Jupiter)

0.025 M♃

Density

2.16 g/cm³

Surface Gravity

1.06 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.369

HZ Position Inner

Controversial No

Discovery

Year 2021

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#861of 1978

top 43.5%

This planet

2.70R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-1807 b 2.70 R⊕ Kepler-27 d 2.71 R⊕ Kepler-1677 b 2.70 R⊕

Metric	Earth	Kepler-1785 b	Jupiter
Radius (R⊕)	1.00	2.70	11.21
Mass (M⊕)	1.00	7.77	317.83
Density (g/cm³)	5.51	2.16	1.33
Surface Gravity (g)	1.00	1.06	2.53
Insolation (S⊕)	1.00	47.30	0.037

Star Catalogue Identifiers

TIC

TIC 271877992

Gaia DR2

Gaia DR2 2080645611761634432

Gaia DR3

Gaia DR3 2080645611761634432

System

Kepler-1785

Percentile among Sub-Neptune cohort

Radius 2.704 R⊕ · percentile 56 / cohort 1978

Mass 7.770 M⊕ · percentile 52 / cohort 1978

Orbital period 19.59 d · percentile 61 / cohort 1946

Distance 745.74 pc · percentile 62 / cohort 1975

ESI 0.369 · percentile 46 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

19.586 days

Semi-major axis

0.1392 AU

Eccentricity

0.000

Inclination

88.19 °

Year Length

A year here lasts approximately 19.59 Earth days (5.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1392 AU.

Transit Fingerprint

Depth

0.053 %

Duration

1.928 h

Impact parameter b

0.992

Rp / R★

0.028415

Transit midpoint (BJD)

2,454,965.3664

Photometric dip

Transit produces a flux drop of 533 ppm lasting ≈ 1.93 h.

Extended Orbital Architecture

Planet / star radius ratio

0.028415

Semi-major axis / stellar radius

23.900

Impact parameter (b)

0.992

Transit mid-time (BJD)

2,454,965.3664

Angular separation (arcsec)

0.18700

Eq. Temperature

666K

(393 °C)

Insolation (S⊕)

47.30

Earth = 1.00

Earth Similarity (ESI)

0.369

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water.

Discovery Paper

Primary reference

Valizadegan et al. 2022

Instrument

Kepler CCD Array

Publication

2022-02

Observation locale

Space

Discovery cohort

Planets confirmed in 2021 at Kepler (12 shown).

Kepler-1816 b · Super-Earth Kepler-1705 c · Sub-Neptune Kepler-1948 b · Rocky Terrestrial Kepler-196 d · Sub-Neptune Kepler-1853 b · Super-Earth Kepler-1840 b · Sub-Neptune Kepler-1881 b · Sub-Neptune Kepler-1858 b · Sub-Neptune Kepler-1874 b · Sub-Neptune Kepler-1802 c · Sub-Neptune Kepler-1749 b · Super-Earth Kepler-1849 b · Sub-Neptune

Host System: Kepler-1785

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,618 K — cooler than the Sun (5,778 K)

Estimated Age

0.30 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.996 R☉

Stellar Mass

0.911 M☉

Metallicity [Fe/H]

0.00

Extended Stellar Properties

Surface gravity (log g)

4.401 dex

Stellar density

1.397 g/cm³

Systemic radial velocity

-18.23 km/s

Rotational v·sin i

3.80 km/s

Metallicity ratio

[Fe/H]

Distance

745.74 parsec

Light-years 2,432.28 ly

V-band magnitude

14.25 mag

Voyager-speed travel 42,893,181 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.312 mas

Total Proper Motion

7.701 mas/yr

PM Right Ascension

0.17 mas/yr

PM Declination

-7.70 mas/yr

Galactic Cartesian (pc)

x = 0.293 · y = -0.607 · z = 0.738

Equatorial (J2000)

RA 295.79218° · Dec 47.60007°

Galactic ℓ, b

80.781° · 11.678°

Ecliptic λ, β

318.092° · 66.783°

HTM-20 index

-1207676217